HELVETICA CHIMICA CTA - Vol. 65, Fasc. 3 (1 982) - Nr. 9 I ... Herrn Prof. Dr. Erich Ziegler zum 70. Geburtstag gewidmet ... A New Simple Synthesis of 2,3,5-Trichlorpyridine Summary A simple synthesis of 2,3,5-trichloropyridine by the copper-catalyzed free radical addition of chloral to acrylonitrile with or without isolation of the primary 1 : 1 adduct, 4-formyl-2,4,4-trichlorobutyronitrile (l), is described. ... Chlorierte Pyridine, insbesondere das 2,3,5-Trichlorpyridin (2), haben ...